Peri-Implant Bone Healing After Simplified Osteotomy With Single Drilling Versus Sequential Drilling Protocol in a Rabbit Tibia Model; Histological and Histomorphometric Study

Abstract

Background:In order to increase patient satisfaction with implant placement, innovative methods that preserve more tissue and are faster to prepare the osteotomy are being applied. Objectives:The aim of the current study was to assess the impact of different drilling techniques on peri-implant bone healing using simplified fast osteotomy technique with single drill versus sequential drilling protocol in a rabbit tibia model. Materials and Methods:Twenty rabbits were allocated into two groups: the test group received a simplified fast drilling approach, whereas the control group underwent a sequential drilling protocol. 10 implants from each group were removed 4 weeks after implantation and 10 implants were removed 6 weeks after implantation for histological and histomorphometric analysis.Results: Histological results revealed formation of greater amount of newly formed mature bone with decreased remodeling figures and inflammatory cells in the second observation period for both groups. The histomorphometric results revealed that surface area of the bone adjacent to implant was significantly higher in the sequential drilling group than in the single drilling group at four weeks (p=.019), while there was no significant difference between the two studied groups at six weeks (p=.589). On the other hand thickness of bone trabeculae was significantly higher in the single drilling group than in the sequential drilling group at four weeks (p=.009),while there was no statistically significant difference between the two studied groups at six weeks (p=.865). Conclusion:Regarding the proposed parameters for evaluating the peri-implant behavior; single drilling osteotomy did not differ from sequential drilling.